Conjoined ultra-wideband (2,300-6,000 MHz) dual antennas for LTE HB/WiFi/5G multi-input multi-output operation in the fifth-generation tablet device

摘要

Conjoined dual antennas with an ultra-wideband (UWB) of 2300-6000 MHz for multi-input multi-output operation in the fifth-generation (5G) tablet device is presented. The UWB covers not only the 5G band in 3300-5000 MHz, but also the long term evolution high band in 2300-2400/2500-2690 MHz and the Wireless Fidelity band in 2400-2500/5100-5900 MHz. Additionally, the envelope correlation coefficient in the UWB is less than 0.1. The conjoined dual antennas have a planar printed structure and require only 32.2 mm (about 0.25-wavelength at 2.3 GHz) along the edge of the device ground plane. The dual antennas share a conjoined section of a ring strip for bandwidth enhancement and a band-pass resonant structure for effective decoupling. The band-pass resonant structure is formed by a printed structure of distributed capacitor and inductor connected in series. Details of the conjoined UWB dual antennas are presented.